314 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



socialis, and Raphistoma ? broggeri. These fossils show that the 

 species is from about the Andrarum limestone horizon. 



Forii ation and locality. — Middle Cambrian : Limestone at Borre- 

 gaard, Bornholm Island, Denmark. 



CORYNEXOCHUS BRENNUS, new species 



Plate 57. figs. 3, 3a-b 



This species came from a boulder of light gray arenaceous Hme- 

 stone derived from the conglomerate at Bic Harbor. It differs from 

 C. senectus in having a beautifully ornamented outer surface and a 

 narrovi^, sharply elevated occipital ring. The surface of the glabella 

 has fine, sharp, irregular ridges arranged in a roughly concentric 

 manner about its longitudinal center, and is very similar to the surface 

 of Corynexochus (Bonnia) parvulns (pi. 64, fig. 6). The test be- 

 tween the fine ridges is minutely punctate. The associated pygidia 

 are more transverse and smoother than the pygidium of C. senectus 

 or C. hiiharis. The largest cranidium has a length of 7 mm. 



A single pygidium from (locality 2r) 2 miles west of the railway 

 station at Bic appears to belong to this species. It was associated in 

 the same rock with fragments of Callavia bicensis and Zacanthoides. 



Formation and locality. — Lower Cambrian: (20) Limestone 

 boulders in conglomerate on shore at east entrance to harbor at Bic ; 

 also doubtfully (2r) limestone boulders in a cut on the Intercolonial 

 Railway, 2 miles (3.2 km.) west of Bic railway station, both in 

 Rimouski County, Quebec, Canada. 



CORYNEXOCHUS BUBARIS, new species 

 Plate 56, figs. 2, 2a-b, 3, 3(7-/ 



This species differs from C. senectus in having a strongly granu- 

 lated surface, sharply elevated occipital ring with a small, sharp 

 median spine, and more strongly ribbed pygidium. The granulated 

 surface is formed by little nodes that appear to rise from irregular 

 ridges, the interspaces of which are finely punctate ; when the thin 

 exterior layer of the test is rubbed off or exfoliated the inner layer 

 appears to be punctate. An enrolled specimen shows eight segments, 

 and the pygidium three rings and a terminal section. 



The granulated surface of this species is of the same character as 

 that of Corynexochus (Bonnia) busa Walcott (pi. 60, fig. 3c). 



The pygidium not only has a minute fringing spine at the end of 

 the anterior border of the first anchylosed segment, but also similar 

 minute spines opposite the second and third segments. This character 



